I feel like the opposition's main hope at this point is to increase the number of soft-liners within the government in order to make it follow the constitution. We already know there are fault lines. Those soft-liners have no love for the opposition (which, I would think, holds them back) but they value democracy. They see the devastation around them and when combined with large numbers of Venezuelans on the streets, they find it harder to stand behind Maduro. Some of these soft-liners are undoubtedly in the military as well, though how that plays out is unpredictable because it depends a lot on rank.